An Army general and engineer, Groves directed the Manhattan Project with a focus on realizing the atomic bomb through his steadfast support and management of large-scale construction efforts.

A young chemist who became embroiled in espionage by passing US nuclear secrets to the Soviet Union, Gold played a pivotal role as an intermediary in the transfer of confidential information.

A German physicist and spy who contributed to Soviet nuclear advancements by providing critical information, Fuchs was involved in the atomic bomb program after fleeing to England.

A young physicist at the Manhattan Project who secretly transmitted valuable atomic information to the Soviet Union, Hall eluded prosecution due to insufficient evidence and lack of confession.

A Norwegian resistance fighter instrumental in sabotaging Germany’s nuclear ambitions by targeting their heavy-water supplies, Haukelid is celebrated for his courage and pivotal actions during World War II.

An expert bomber pilot who led the mission to deploy the atomic bomb over Japan, Tibbets trained his crew for precision and provided firsthand accounts of the weapon's effects on Hiroshima.

A Nobel Prize-winning physicist who led Germany’s atomic bomb efforts during World War II, Heisenberg later contributed to nuclear development in West Germany.

A former professional baseball player turned spy who monitored German physicist Werner Heisenberg for signs of German progress on atomic weapons, Berg's mission underscores the dual nature of scientific pursuit and espionage.

A pioneering physicist whose work on nuclear fission played a crucial role in understanding atomic reactions, Meitner faced challenges as a Jewish scientist in exile during the Nazi regime.

A German scientist whose discovery of atomic fission initiated the race for nuclear weapons, Hahn grappled with ethical concerns over his contributions.

A secretary in Santa Fe who managed logistical details for Oppenheimer and the Manhattan Project scientists, McKibben brought a grounded perspective to the intense and elite scientific environment.

The author and historian known for his fast-paced narrative style, Sheinkin crafts engaging nonfiction stories and has received acclaim for his portrayal of historical events.